| Covers listed |
|
| 1927: | February, March, April, May, June, July, August, September, October, November, December, |
| 1928: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1929: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1930: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1931: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1932: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1933: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1934: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1935: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1936: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1937: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1938: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1939: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1940: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1941: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1942: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1943: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1944: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1945: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1946: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1947: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1948: | January, February, March, April, May, |
